/**
 * @author lscl
 * @version 1.0
 * @intro:
 */
public class Demo08_变量和常量运算 {
    public static void main(String[] args) {
        byte b1 = 1;
        byte b2 = 2;
        byte b3 = 1 + 2;

        int  b4 = b1 + b2;
        byte  b5 = (byte) (b1 + b2);



    }
}
